Question

For the function g(x) = 3x -21, what is g(6)

Answer 1

Here,
g(x)=3x-21
g(6)=?
Now,
Let the x be 6
g(6)=3*6-21
= 18-21
= -3

Answer 2

3·6 - 21

Explanation:

just replace x with 6